Rain Garden
Open in tool →Wet-leaf teal and moss with a soft peach — an overcast spring, calmer than the bright version and better for long reading.
Color
#21333b
#21333b
hex
#21333brgb
rgb(33, 51, 59)hsl
hsl(198, 28%, 18%)oklch
oklch(0.309 0.027 227.5)Closest name: Blue Whale (#1e3442)Relative luminance 0.0301
Colors that go with #21333b
Amber, Blue and Blush Pink lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Amber #ffbf00
shippedAmber is paired with #21333b in 9 real palettes, including Beach Hut and McDonald's's brand system, as the supporting colour.
Blue #0000ff
shipped17 real palettes, including Minecraft's brand system and Headspace's brand system put Blue beside #21333b, as the accent.
Blush Pink #e8b4b8
shipped5 real palettes, including Rain Garden and Blush put Blush Pink beside #21333b, as the accent.
Burlywood #deb887
shippedBurlywood is paired with #21333b in 5 real palettes, including Coastal and Polaroid, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #21333b: 9 real palettes, including Coastal and Clean Beauty, as the lead colour.
Champagne #f7e7ce
shipped8 real palettes, including Darkroom and Sweetgreen's brand system put Champagne beside #21333b, as the surface under it.
Chocolate #d2691e
shippedChocolate shows up next to #21333b in 4 real palettes, including Homestead and Wellness, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the near-white surface #21333b was made for — maximum legibility with no colour cast to argue with.
Real palettes that use #21333b
Tints & shades
Harmonies
Contrast
| #21333b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 13.11:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.6:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #21333b as the background.
Brands using this color
- Vimeosecondary · #23313b · Δ0.717
- UEFAsecondary · #1a313c · Δ1.243
- Asanaprimary · #273240 · Δ1.415
- Amazonsecondary · #232f3e · Δ1.648
- Bloombergsecondary · #2b333f · Δ1.713
- Hermèsaccent · #2b333f · Δ1.713
- PlayStation® Official Site: Consoles, Games, Accessories & MoreSony Interactive Entertainmentsecondary · #2b333f · Δ1.713
- Dockerprimary · #2c333f · Δ1.856
- Audiprimary · #2c343f · Δ1.876
Palettes built around it
Harbour
Open in tool →Steel blue and haze with a buoy orange on a pale grey — the maritime palette every port town uses for a reason.
Still Water
Open in tool →Dusty teal and mist with a sand accent — low chroma, low contrast between colours, high contrast for text: the recipe for calm.
Dusty Blue
Open in tool →Dusty blue and mist with a nude accent — the quiet wedding palette; nothing here competes with a photograph.
Fonts for this mood
#21333b reads as cool, muted, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #21333b
live endpointPoint any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #21333b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/21333b-9cb3c4-df4e69-1f232d-e9f1f0?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md